Just thought i would get your opinions on my sons 87 f150 4x4, We have replaced front Brakes, Master cylinder, Brake Booster, Made sure brakes are bled, We still have the soft brake problem. We were told today that people with this similar problem, They replaced the Electro Hydrauic valve (EH Valve). It also fixed the Rear Antilock Light that is on. Does this sound like a possibility to you guys? We replaced the speed sensor on the rear axle also. Ford no longer carries this part from what i have been told, but can locate one on a wreck. Is this part located on the drivers rail. ? Any other ideas or are we way off base?

 

Did you bench bleed the master cylinder?
Did you bleed the brakes in the correct order - RR, LR, RF, LF?

Are the front calipers on the correct sides? Had an issue with a Jeep CJ that used Ford brakes - I guess that's why they were called American Motors - had a little bit of Ford, GM, and Chrysler thrown in. Changed the front calipers and never could get a solid pedal. Finally realized that the bleed ports were at the bottom of the piston instead of the top so the air never would bleed. Swapped sides and all good. D'Oh!

If you did anything with the rear brakes, the star adjusters need to be dialed out properly or you will get a long pedal.

No experience here with that valve, but I suppose anything in the system is a possibility until proven otherwise.